chore(pglt_statement_splitter): add test for comments

Author: psteinroe

crates/pglt_statement_splitter/tests/data/with_comments__4.sql

@@ -0,0 +1,13 @@
+-- test
+select id, name, test1231234123, unknown from co;
+
+-- in between two statements
+
+select 14433313331333 -- after a statement
+
+alter table --within a statement
+test drop column id;
+
+select lower('test');
+--after a statement
+